And on the actionbar I have several buttons that I need to be able to access from activities within tabs. But findViewById returns null for any view located on the actionbar - I find this quite logical, because for any activity inside tab their contentRoot is FrameLayout (and actionbar is ourside of it), but nevertheless I need an access to the actionbar, because icons for all currently available actions are located there.

I also have thought of passing actionbar as extra to intents for all activities inside tabs, but View is not serializable nor Parcelable, so it can't be passed as extra.